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. 2014 May 16;2:45. doi: 10.3389/fpubh.2014.00045

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Copyright © 2014 Mudoh, Parveen, Schwarz, Rippen and Chaudhuri.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Freshness as determined by visual appearance with time (days) and temperature (5, 10, and 20°C), shown as percent of full scale, 100 = fresh, 0 = not fresh.